Ray-Based Imaging and Model Building in Tilted Orthorhombic Media

We present a method for ray tracing in orthorhombic media formulated in terms of closed-form expressions in Tsvankin parameters. This method is both computationally efficient and sufficiently accurate to produce high-quality migration results. The closed-form expressions may be used to compute differentials that can be used in tomography. We demonstrate the method using both a synthetic example and real data from offshore Trinidad that presents significant evidence of orthorhombic anisotropy.